The system consisting of the sun and the planets and other objects that revolve around it.

An object that orbits a star, is large enough to become rounded by its own gravity, and has cleared the area of its orbit.

One of the small asteroid-like bodies that formed the building blocks of the planets.

A unit of distance equal to the average distance between Earth and the sun, about 150 million kilometers.

The central region of the sun, where nuclear fusion takes place.

A region of very tightly packed gas in the sun's interior where energy is transferred mainly in the form of electromagnet radiation.

The inner layer of the sun's atmosphere that gives off its visible light; the sun's surface.

The outer layer of the sun's atmosphere.

A huge, reddish loop of gas that protrudes

The process in which two atomic nuclei combine to form a larger nucleus, forming a heavier element and releasing huge amounts of energy; the process by which energy is produced in the stars.

The outermost layer of the sun's interior.

The middle layer of the sun's atmosphere.

A stream of electrically charged particles that emanate from the sun's corona.

A dark area of gas on the sun's surface that is cooler than surrounding gases.

An eruption of gas from the sun's surface that occurs when the loops in sunspot regions suddenly connect.

The name often given to the four inner planets; Mercury, Venus, Earth, and Mars.

The trapping of heat near a planet's surface by certain gases in the planet's atmosphere.

The name often given to the outer planets: Jupiter, Saturn, Uranus, and Neptune

T thin disk of small ice and rock particles surrounding a planet.

The region of the solar systems between the orbits of Mars and Jupiter, where many asteroids are found.

A spherical region of comets that surrounds the solar system

The fuzzy outer layer of a comet.

A meteoroid that passes through the atmosphere and hits Earth's surface.

A region where many small objects orbit the sun and that stretches from beyond the orbit of Neptune to about 100 times Earth's distance from the sun.

A loose collection of ice and dust that orbits the sun, typically in a long, narrow orbit.

The solid inner core of a comet.

One of the rocky objects revolving around the sun that are too small and numerous to be considered planets.

A streak of light produced by the burning of a meteoroid in Earth's atmosphere.

A chunk of rock or dust in space, generally smaller than an asteroid.

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ch.3, 2-6

Question	Answer
solar system	The system consisting of the sun and the planets and other objects that revolve around it.
planet	An object that orbits a star, is large enough to become rounded by its own gravity, and has cleared the area of its orbit.
planetesimal	One of the small asteroid-like bodies that formed the building blocks of the planets.
astronomical unit	A unit of distance equal to the average distance between Earth and the sun, about 150 million kilometers.
core	The central region of the sun, where nuclear fusion takes place.
radiation zone	A region of very tightly packed gas in the sun's interior where energy is transferred mainly in the form of electromagnet radiation.
photosphere	The inner layer of the sun's atmosphere that gives off its visible light; the sun's surface.
corona	The outer layer of the sun's atmosphere.
prominence	A huge, reddish loop of gas that protrudes
nuclear fusion	The process in which two atomic nuclei combine to form a larger nucleus, forming a heavier element and releasing huge amounts of energy; the process by which energy is produced in the stars.
convection zone	The outermost layer of the sun's interior.
chromosphere	The middle layer of the sun's atmosphere.
solar wind	A stream of electrically charged particles that emanate from the sun's corona.
sunspot	A dark area of gas on the sun's surface that is cooler than surrounding gases.
solar flare	An eruption of gas from the sun's surface that occurs when the loops in sunspot regions suddenly connect.
terrestrial planets	The name often given to the four inner planets; Mercury, Venus, Earth, and Mars.
greenhouse effect	The trapping of heat near a planet's surface by certain gases in the planet's atmosphere.
gas giant	The name often given to the outer planets: Jupiter, Saturn, Uranus, and Neptune
ring	T thin disk of small ice and rock particles surrounding a planet.
asteroid belt	The region of the solar systems between the orbits of Mars and Jupiter, where many asteroids are found.
oort cloud	A spherical region of comets that surrounds the solar system
coma	The fuzzy outer layer of a comet.
meteoroid	A meteoroid that passes through the atmosphere and hits Earth's surface.
Kuiper belt	A region where many small objects orbit the sun and that stretches from beyond the orbit of Neptune to about 100 times Earth's distance from the sun.
comet	A loose collection of ice and dust that orbits the sun, typically in a long, narrow orbit.
nucleus	The solid inner core of a comet.
asteroid	One of the rocky objects revolving around the sun that are too small and numerous to be considered planets.
meteor	A streak of light produced by the burning of a meteoroid in Earth's atmosphere.
meteoroid	A chunk of rock or dust in space, generally smaller than an asteroid.

Created by: user-1975214

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